UTME Past Questions
Chemistry · 2021
40 questions
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/ 40
Question 01
Which of the following equations is not feasible as written?
A
2NaOH + Cl
2
→ NaCl + NaClO + H
2
O
B
2Fe + 3Cl
2
→ 2FeCl
3
C
4P + 5O
3
→ 2P
2
O
5
D
Fe + Cl
2
→ FeC
12
Question 02
Which of this following can be used in making perfumes?
A
Ethylethanoate
B
Ethanol
C
Benzene
D
Ethanoic acid
Question 03
In ammonia molecule, the number of non-bonding electron(s) is/are
A
4
B
2
C
3
D
1
Question 04
How many moles of the acid are present in 200 cm3 of 1.5 moldm-3 HCl?
A
0.45 moles
B
0.6 moles
C
0.3 moles
D
0.7 moles
Question 05
Latex is a polymer of
A
Isoprene
B
Ethane chloride
C
Styrene
D
Terylene
Question 06
The use of hydrogen gas to fill balloons for both meteorological and other scientific pur[poses is limited by its
A
Lightness
B
Inertness
C
Monovalency
D
Inflammability
Question 07
If 93cm3 of SO2 diffuses through a porous partition in 14s, how long will it take the same volume of H2S to diffuse through the same partition, under the same conditions?
A
7.4s
B
3.8s
C
26.3s
D
9.1s
Question 08
Brass is an alloy of copper and
A
Zinc
B
Tin
C
Carbon
D
Sulphur
Question 09
Name the compound below
A
4,4, dimethylpentane
B
2,2,4 – trimethylbutane
C
2,2 – dimethylpentane
D
1,3,3 – trimethylbutane
Question 10
The flame used in welding and cutting of metals is?
A
Oxy - ethane flame
B
Oxygen flame
C
Hydrogen flame
D
Oxy – acetylene flame
Question 11
Which of the following decolorizes acidified KMnO
4
?
A
Butane
B
Ethane
C
Ethane
D
Propane
Question 12
What mass of aluminium is deposited when 15A of current is used to electrolyze its molten form for 2hrs, 30mins?
A
13g
B
17g
C
22g
D
14g
Question 13
Rain water is considered as a mixture because?
A
It contains less amount of oxygen
B
It contains particles of dust and other substances
C
It forms lather readily with soap
D
Of its colour
Question 14
In the preparation of which of the following gases is kips apparatus used?
A
O
2
B
H
2
C
H
2
S
D
N
2
Question 15
Ethanol is used in ¬¬______ industry
A
Laundry
B
Bottling
C
Brewing
D
Tanning
Question 16
The resulting solution when water reacts with chlorine contains?
A
HCl & HOCl
B
HCl
C
HOCl
D
H2 & HCl
Question 17
The alloy of aluminium used in the construction of aircraft is?
A
Duralumin
B
Alnico
C
Soft solder
D
Bronze
Question 18
How many coulombs of electricity will be required to deposit 6.11g of silver from a solution of silver salt? [Ag =108, IF =96,500C].
A
5,459.4C
B
1,819.5C
C
2,729.7C
D
10,918.8C
Question 19
What volume of which gas will be left unused when 100 cm
3
of hydrogen and 40cm
3
of oxygen are mixed and sparked in a combustion chamber?
A
10cm
3
of O
2
B
20cm
3
of O
2
C
10cm
3
of H
2
D
20cm
3
of H
2
Question 20
An alcohol which does not have the hydroxyl group bounded to the first carbon atom can be classified as?
A
Primary
B
Primary and secondary
C
Secondary and tertiary
D
Tertiary
Question 21
What is the colour of phenolphthalein in an acidic solution?
A
Colourless
B
Pink
C
Red
D
Blue
Question 22
In the process of silver – plating metal X
A
Silver is the anode while X is the cathode and direct current is used
B
Silver is the cathode while X is the anode and alternating current is used
C
Silver is the anode while X is the cathode and alternating current is used
D
Silver is the cathode and X is the anode and direct current is used
Question 23
Which of the following has zero fold degeneracy?
A
p
B
s
C
d
D
f
Question 24
45g of Pb(NO
3
)
2
is required to saturate 25cm
3
of distilled water at 20
o
C. Determine the solubility of the salt at this temperature.
A
HCl
B
SO
2
C
CO
2
D
NO
2
Question 25
With which of the following does ammonia react to produce a dense white fume?
A
HCl
B
SO
2
C
CO
2
D
NO
2
Question 26
In a given homologous series, successive member differ in their relative molecular mass by?
A
13
B
14
C
26
D
28
Question 27
The gas that is used for the treatment of cancer is?
A
Argon
B
Neon
C
Radon
D
Xenon
Question 28
Entropy increases in which of the following orders?
A
Solid → Liquid → Gas
B
Gas → Liquid → Solid
C
Liquid → Gas → Solid
D
Solid → Gas → Liquid
Question 29
An example of an acidic oxide is?
A
N
2
O
B
NO
C
CuO
D
SO
2
Question 30
The petroleum fraction that is used in heating furnaces is?
A
Petrol
B
Kerosene
C
Diesel
D
Lubrication oil
Question 31
The process by which starch is converted to ethanol is ?
A
Distillation
B
Hydration
C
Dehydration
D
Fermentation
Question 32
The radioactive emission with the least ionization power is?
A
X – rays
B
Alpha particles
C
Beta particles
D
Gamma rays
Question 33
How many hydrogen ions ate present in 500cm
3
of 0.5moldm
-3
of H
2
SO
4
?
A
3.01x10
23
B
1.505x10
23
C
7.525 x10
22
D
7.525 x10
23
Question 34
What is the oxidation number of chromium in K
2
Cr
2
O
7
?
A
+1
B
+2
C
+3
D
+6
Question 35
The maximum number of electrons that the N shell can accommodate is
A
8
B
18
C
32
D
50
Question 36
What volume of CO2 will be produced at STP when 33.6g of sodium hydrogen trioxocarbonate (IV) is subjected to thermal decomposition?
A
4.48dm
3
B
2,24dm
3
C
1.12dm
3
D
0.56dm
3
Question 37
A catalysis speeds up the rate of a chemical reaction by?
A
Taking part in the reaction
B
Polymerizing
C
Increasing the activation energy
D
Lowering the activation energy
Question 38
Which of the following gases is collected by upward displacement of air?
A
H
2
B
Cl
2
C
NH
3
D
None
Question 39
An alkanol which is trihydric is
A
Glycol
B
Ethanol
C
Glycerol
D
Propanol
Question 40
The most dangerous gaseous pollutant is?
A
CO
2
B
CO
C
NH
3
D
H
2
S
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